Teeth

Question 1

Teeth is composed of an internal soft tissue _____ & 3 calcified tissues: _____, ______, and ______

Answer 1

pulp
enamel
cementum
dentin

Question 2

the surface layer of teeth is composed of

Answer 2

enamel and cementum

Question 3

dentin lies where

Answer 3

between the surface layer and pulp

Question 4

calcified dental tissues are made of

Answer 4

calcium hydroxyapatite

Question 5

teeth have an enamel-covered _____

Answer 5

crown

Question 6

teeth have a cementum-covered ____

Answer 6

root

Question 7

the region where the crown and root meet is called

Answer 7

cervix

Question 8

composition of enamel

Answer 8

highly calcified matrix composed of 2 fibrous high molecular weight glycoproteins - enamelin and amelogen

Question 9

enamel is produced by

Answer 9

ameloblasts

Question 10

enamel is unique in that

Answer 10

it is acellular after tooth eruption, cannot repair itself

Question 11

where is dentin located

Answer 11

surrounds central pulp chamber & root canal

Question 12

composition of dentin

Answer 12

calcified matrix containing collagen fibers

Question 13

dentin is created by _____, and are different from ameloblasts because?

(how are ameloblasts to enamel different from ____ to dentin)

Answer 13

odontoblasts, because they remain and continue to produce dentin

Question 14

cytoplasmic extensions sent out by odontoblasts into tunnel-like spaces within dentin

Answer 14

dentinal tubules

Question 15

composition of cementum

Answer 15

collagen-containing calcified matrix

Question 16

cementocytes are located where in cementum

Answer 16

apical region of cementum (cellular cementum) located within lacunae

Question 17

what do cementocytes do

Answer 17

send processes within canaliculi towards peridontal ligament

Question 18

what’s in the coronal region of cementum?

Answer 18

no cementocytes, that’s for sure

Question 19

dental pulp composition and cells found in it

Answer 19

gelatinous connective tissue with odontoblasts in its peripheral layer; fibroblasts & mesenchymal cells; thin collagen fibers

Question 20

what kind of innervations does dental pulp have?

Answer 20

sympathetic nerve fibers (vasomotor) control blood vessel luminal diameter & sensory nerve fibers
all sensations from pulp are interpreted as pain

Question 21

is dental pulp vascularized

Answer 21

yes, it’s richly vascularized

Question 22

composition of periodontal ligament

Answer 22

consists of dense irregular CT

Question 23

location of periodontal ligament

Answer 23

located between root cementum & bony alveolus

Question 24

how are the collagen fibers arranged in the periodontal ligmaent

Answer 24

arranged in principal fiber bundles

Question 25

what is the function of principal fiber bundles

Answer 25

extend from cementum to bone and suspends the tooth in its alveolus - absorb&counteracts chewing forces

Question 26

periodontal ligament has a(n) ________ nerve & vascular supply

Answer 26

abundant

Question 27

gingivae are covered by what type of epithelium

Answer 27

stratified squamous partially keratinized (parakeratinized) to keratinized epithelium

Question 28

gingivae have what type of connective tissue and how is it arranged?

Answer 28

has dense irregular CT, collagen is arranged in 5 principal fiber bundles - similar to periodontal ligament. -attaches to enamel surface via hemidesmosome

Question 29

what does the periodontal ligament attach to....? | probably asked this before

Answer 29

alveolar bone proper

Question 30

alveolar bone consists of

Answer 30

an inner layer (cribiform plate) and an outer layer (cortical plate) of compact bone with an intervening layer of cancellous (trabecular) bone (spongiosa)

Question 31

what is the inner layer of alveolar bone called again?

Answer 31

cribiform plate

Question 32

what is the outer layer of alveolar bone called again?

Answer 32

cortical plate